Load Specifications
Load data in caliber .300 PRC with .308 | 165gr | Swift Scirocco bullet and 82 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Norma MRP and Vihtavuori N560.
Important Notice: DO NOT go below Minimum Charge or above Maximum Charge. Since we have no control over the equipment and components used, any responsibility and liability for the results achieved is rejected.
Only powders/loads that match the current filter criteria are displayed: max pressure of a load ≤ 90% of max. standardized pressure, fill rate ≥ 80% and propellant combustion ≥ 95%. Use the sliders above the tables to adjust these thresholds.
Charge: Powder weight in grains. Start with the minimum load and work up carefully.
FR (Fill Rate): Case fill as a percentage. Values above 100% mean compressed loads.
MaxP / %: Maximum chamber pressure in bar and as a percentage of the standardized maximum for this caliber.
V(0): Muzzle velocity in feet per second (fps) at the standardized barrel length.
z (Powder Burn): Estimated propellant combustion percentage at bullet exit.
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Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2700 | <<locked>> | 82% | 58,465 psi | 90% | 3012 fps | 99.4% |
| Accurate 3100 | <<locked>> | 98% | 58,769 psi | 90% | 3071 fps | 100% |
| Accurate 4064 | <<locked>> | 82% | 58,494 psi | 90% | 2992 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 56,347 psi | 87% | 3058 fps | 100% |
| Accurate MAGPRO | <<locked>> | 96% | 57,290 psi | 88% | 3166 fps | 97% |
| ADI AR 2208 | <<locked>> | 84% | 57,754 psi | 89% | 3025 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 57,246 psi | 88% | 3110 fps | 98.8% |
| ADI AR 2213 | <<locked>> | 98% | 58,769 psi | 90% | 3169 fps | 98.2% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 40,785 psi | 63% | 2867 fps | 97.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 55,579 psi | 86% | 2995 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 57,058 psi | 88% | 3117 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 58,508 psi | 90% | 3133 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 56,623 psi | 87% | 3094 fps | 98.8% |
| Alliant Reloder-22 | <<locked>> | 98% | 58,407 psi | 90% | 3163 fps | 99.1% |
| Alliant Reloder-23 | <<locked>> | 98% | 55,463 psi | 85% | 3081 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 51,227 psi | 79% | 3074 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 56,028 psi | 86% | 3173 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 57,305 psi | 88% | 3143 fps | 98.9% |
| Bofors RP3 | <<locked>> | 82% | 56,550 psi | 87% | 3012 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 47,239 psi | 73% | 2992 fps | 96.5% |
| Bofors RP5 | <<locked>> | 98% | 58,407 psi | 90% | 3163 fps | 99.1% |
| Bofors RP7 | <<locked>> | 86% | 55,564 psi | 85% | 3002 fps | 99.2% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 50,647 psi | 78% | 3018 fps | 97.5% |
| Hodgdon H380 | <<locked>> | 82% | 56,710 psi | 87% | 3035 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 58,247 psi | 90% | 3114 fps | 99.7% |
| Hodgdon H4350 | <<locked>> | 86% | 57,363 psi | 88% | 3068 fps | 99% |
| Hodgdon H4831 | <<locked>> | 94% | 54,882 psi | 84% | 3041 fps | 96.8% |
| Hodgdon H4831 SC | <<locked>> | 96% | 57,493 psi | 88% | 3087 fps | 97.4% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 57,479 psi | 88% | 3038 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 50,299 psi | 77% | 3130 fps | 98.7% |
| Hodgdon Superformance | <<locked>> | 86% | 54,882 psi | 84% | 3087 fps | 99.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,869 psi | 57% | 1919 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 57,130 psi | 88% | 3005 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 56,956 psi | 88% | 3041 fps | 99.4% |
| IMR 4451 Enduron | <<locked>> | 86% | 57,072 psi | 88% | 3031 fps | 99.6% |
| IMR 4831 | <<locked>> | 90% | 56,594 psi | 87% | 3048 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 56,231 psi | 87% | 3031 fps | 97.3% |
| IMR 7828 SSC | <<locked>> | 98% | 56,202 psi | 86% | 3140 fps | 97.9% |
| Lovex S062 | <<locked>> | 82% | 57,624 psi | 89% | 2995 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 57,667 psi | 89% | 3028 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 55,680 psi | 86% | 3022 fps | 99.6% |
| Lovex S071ᴾ | <<locked>> | 100% | 52,214 psi | 80% | 2972 fps | 99.6% |
| Norma 203B | <<locked>> | 82% | 58,436 psi | 90% | 3058 fps | 100% |
| Norma 204 | <<locked>> | 90% | 58,131 psi | 89% | 3097 fps | 98.8% |
| Norma MRP | <<locked>> | 96% | 58,465 psi | 90% | 3192 fps | 99.8% |
| Norma URP | <<locked>> | 90% | 58,494 psi | 90% | 3097 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 57,043 psi | 88% | 3163 fps | 98.3% |
| Ramshot Hunter | <<locked>> | 90% | 57,377 psi | 88% | 3100 fps | 99.9% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 55,259 psi | 85% | 3094 fps | 99.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,521 psi | 58% | 1962 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 56,405 psi | 87% | 3018 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 58,015 psi | 89% | 3123 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 56,463 psi | 87% | 3081 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 58,624 psi | 90% | 3169 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 50,807 psi | 78% | 3127 fps | 99.5% |
| Rottweil R 903 | <<locked>> | 84% | 56,826 psi | 87% | 3012 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 58,624 psi | 90% | 3077 fps | 98.2% |
| Rottweil R 905 | <<locked>> | 94% | 56,057 psi | 86% | 3084 fps | 98.8% |
| Rottweil R 907 | <<locked>> | 86% | 55,564 psi | 85% | 3002 fps | 99.2% |
| Shooters World Long Rifle | <<locked>> | 88% | 57,667 psi | 89% | 3028 fps | 100% |
| Shooters World Precision | <<locked>> | 82% | 57,624 psi | 89% | 2995 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 55,680 psi | 86% | 3022 fps | 99.6% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 58,276 psi | 90% | 3071 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 56,840 psi | 87% | 2884 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 57,072 psi | 88% | 2979 fps | 99.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 55,608 psi | 86% | 3077 fps | 98.7% |
| Somchem S355 | <<locked>> | 84% | 56,507 psi | 87% | 3005 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 56,695 psi | 87% | 3012 fps | 97.2% |
| Somchem S365 | <<locked>> | 92% | 58,610 psi | 90% | 3097 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 56,695 psi | 87% | 3058 fps | 99.3% |
| Vihtavuori N150 | <<locked>> | 86% | 57,812 psi | 89% | 2979 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 56,695 psi | 87% | 3031 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 56,159 psi | 86% | 3031 fps | 99.1% |
| Vihtavuori N540 | <<locked>> | 82% | 58,436 psi | 90% | 2972 fps | 100% |
| Vihtavuori N550 | <<locked>> | 88% | 55,985 psi | 86% | 3038 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 57,943 psi | 89% | 3110 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 58,305 psi | 90% | 3182 fps | 97.8% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 53,983 psi | 83% | 3087 fps | 97.2% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 56,362 psi | 87% | 2992 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 58,465 psi | 90% | 3117 fps | 99.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 56,579 psi | 87% | 3219 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 56,666 psi | 87% | 3051 fps | 98.7% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2700 | <<locked>> | 80% | 54,737 psi | 84% | 2953 fps | 99% |
| Accurate 3100 | <<locked>> | 82% | 34,040 psi | 52% | 2595 fps | 95.6% |
| Accurate 4064 | <<locked>> | 80% | 54,926 psi | 85% | 2940 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 42,888 psi | 66% | 2818 fps | 99.4% |
| Accurate MAGPRO | <<locked>> | 92% | 49,617 psi | 76% | 3028 fps | 95.2% |
| ADI AR 2208 | <<locked>> | 80% | 50,966 psi | 78% | 2913 fps | 100% |
| ADI AR 2209 | <<locked>> | 84% | 41,089 psi | 63% | 2799 fps | 95.1% |
| ADI AR 2213 | <<locked>> | 92% | 47,834 psi | 74% | 2969 fps | 95.8% |
| ADI AR 2225 | <<locked>> | 96% | 35,810 psi | 55% | 2736 fps | 95% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 52,185 psi | 80% | 2943 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 41,162 psi | 63% | 2825 fps | 99.4% |
| Alliant Reloder-17 | <<locked>> | 80% | 47,355 psi | 73% | 2956 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 40,857 psi | 63% | 2789 fps | 95.2% |
| Alliant Reloder-22 | <<locked>> | 88% | 41,568 psi | 64% | 2848 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 80% | 30,530 psi | 47% | 2569 fps | 97.9% |
| Alliant Reloder-25 | <<locked>> | 86% | 32,474 psi | 50% | 2641 fps | 95.6% |
| Alliant Reloder-26 | 74.5 gr | 80% | 33,083 psi | 51% | 2694 fps | 96.7% |
| Bofors RP15 | <<locked>> | 90% | 41,191 psi | 63% | 2835 fps | 95.2% |
| Bofors RP3 | <<locked>> | 80% | 52,837 psi | 81% | 2956 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 44,179 psi | 68% | 2930 fps | 95.5% |
| Bofors RP5 | <<locked>> | 88% | 41,568 psi | 64% | 2848 fps | 95.6% |
| Bofors RP7 | <<locked>> | 80% | 45,992 psi | 71% | 2828 fps | 97.7% |
| Hodgdon H1000 | <<locked>> | 96% | 44,150 psi | 68% | 2887 fps | 95.6% |
| Hodgdon H380 | <<locked>> | 80% | 53,011 psi | 82% | 2972 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 44,599 psi | 69% | 2867 fps | 97.9% |
| Hodgdon H4350 | <<locked>> | 80% | 47,195 psi | 73% | 2887 fps | 97.3% |
| Hodgdon H4831 | <<locked>> | 90% | 47,906 psi | 74% | 2917 fps | 95.1% |
| Hodgdon H4831 SC | <<locked>> | 92% | 50,198 psi | 77% | 2963 fps | 95.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 38,711 psi | 60% | 2710 fps | 99.7% |
| Hodgdon Retumbo | <<locked>> | 94% | 41,089 psi | 63% | 2917 fps | 96% |
| Hodgdon Superformance | <<locked>> | 80% | 43,830 psi | 67% | 2881 fps | 97.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,485 psi | 42% | 1716 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 53,635 psi | 83% | 2949 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 41,524 psi | 64% | 2749 fps | 96.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 47,442 psi | 73% | 2861 fps | 98.4% |
| IMR 4831 | <<locked>> | 80% | 40,843 psi | 63% | 2762 fps | 99.1% |
| IMR 4955 Enduron | <<locked>> | 88% | 46,514 psi | 72% | 2854 fps | 95% |
| IMR 7828 SSC | <<locked>> | 92% | 45,861 psi | 71% | 2943 fps | 95.3% |
| Lovex S062 | <<locked>> | 80% | 54,157 psi | 83% | 2946 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 44,962 psi | 69% | 2805 fps | 98.9% |
| Lovex S070 | <<locked>> | 80% | 43,178 psi | 66% | 2789 fps | 97.7% |
| Lovex S071 | <<locked>> | 86% | 33,214 psi | 51% | 2575 fps | 95.3% |
| Norma 203B | <<locked>> | 80% | 54,897 psi | 84% | 3002 fps | 100% |
| Norma 204 | <<locked>> | 80% | 41,249 psi | 63% | 2779 fps | 95% |
| Norma MRP | 75.9 gr | 84% | 38,072 psi | 59% | 2792 fps | 95.8% |
| Norma URP | <<locked>> | 80% | 42,148 psi | 65% | 2808 fps | 99.2% |
| Ramshot Grand | <<locked>> | 92% | 45,803 psi | 70% | 2953 fps | 95.7% |
| Ramshot Hunter | <<locked>> | 80% | 40,988 psi | 63% | 2795 fps | 97.8% |
| Ramshot Magnum | <<locked>> | 90% | 38,174 psi | 59% | 2759 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,137 psi | 43% | 1759 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 52,808 psi | 81% | 2956 fps | 99.5% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 50,256 psi | 77% | 3009 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 42,714 psi | 66% | 2835 fps | 99.2% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 41,060 psi | 63% | 2848 fps | 98.8% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 37,985 psi | 58% | 2831 fps | 96% |
| Rottweil R 903 | <<locked>> | 80% | 49,792 psi | 77% | 2900 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 45,266 psi | 70% | 2838 fps | 95.2% |
| Rottweil R 905 | <<locked>> | 84% | 40,147 psi | 62% | 2776 fps | 95.1% |
| Rottweil R 907 | <<locked>> | 80% | 45,992 psi | 71% | 2828 fps | 97.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 44,962 psi | 69% | 2805 fps | 98.9% |
| Shooters World Precision | <<locked>> | 80% | 54,157 psi | 83% | 2946 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 43,178 psi | 66% | 2789 fps | 97.7% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 51,039 psi | 79% | 2956 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 50,227 psi | 77% | 2789 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 43,918 psi | 68% | 2746 fps | 97.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 39,798 psi | 61% | 2769 fps | 95% |
| Somchem S355 | <<locked>> | 80% | 49,806 psi | 77% | 2897 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 49,617 psi | 76% | 2887 fps | 95.6% |
| Somchem S365 | <<locked>> | 80% | 38,928 psi | 60% | 2762 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 38,174 psi | 59% | 2697 fps | 95.4% |
| Vihtavuori N150 | <<locked>> | 80% | 47,572 psi | 73% | 2818 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 43,627 psi | 67% | 2805 fps | 99.4% |
| Vihtavuori N165 | <<locked>> | 88% | 40,263 psi | 62% | 2736 fps | 95.7% |
| Vihtavuori N540 | <<locked>> | 80% | 54,781 psi | 84% | 2923 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 43,062 psi | 66% | 2808 fps | 99.2% |
| Vihtavuori N555 | <<locked>> | 80% | 34,142 psi | 53% | 2651 fps | 97.9% |
| Vihtavuori N560 | 81.3 gr | 90% | 47,181 psi | 73% | 2979 fps | 95.2% |
| Vihtavuori N565 | <<locked>> | 96% | 46,992 psi | 72% | 2959 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 42,743 psi | 66% | 2772 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 44,759 psi | 69% | 2871 fps | 97.9% |
| Winchester StaBALL HD | <<locked>> | 80% | 27,050 psi | 42% | 2552 fps | 97.3% |
| Winchester Supreme 780 | <<locked>> | 88% | 43,018 psi | 66% | 2802 fps | 95.9% |
Recommended = one of the top powders for this cartridge and bullet combination.
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 88 powders for .300 PRC loaded with the .308 | 165gr | Swift Scirocco. Winchester StaBALL HD delivers the highest muzzle velocity at 3,219 fps; across all powders the maximum-charge window runs from 1,919 fps to 3,219 fps. ADI AR 2217 gives the best case fill at 100 %, and 88 of the 88 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (448 MPa), the top charges use 56–90 %, leaving at least 10 % headroom. The 165.0 gr projectile in 0.308" calls for a 1:11.5 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, Alliant Reloder-25 reach 100 % fill or more at maximum charge, so these are compressed loads: they need a long drop tube to seat cleanly and react sensitively to the case capacity of your own brass lot. Alliant Reloder-26, Norma MRP, Vihtavuori N560 rank at the top here: for .300 PRC with the .308 | 165gr | Swift Scirocco they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Baschieri & Pellagri 109, IMR 8133 Enduron, Norma 217 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.